Cisco Cisco IOS Software Release 12.0(19)S
Explicit Tracking of Hosts, Group, and Channels for IGMP Version 3
show ip igmp membership
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Cisco IOS Release 12.0(19)S
show ip igmp membership
To display Internet Group Management Protocol (IGMP) membership information for multicast groups
or (S, G) channels, use the show ip igmp membership command in EXEC mode.
or (S, G) channels, use the show ip igmp membership command in EXEC mode.
show ip igmp membership [group-address | group-name] [tracked] [all]
Syntax Description
Command Modes
EXEC
Command History
Usage Guidelines
Unlike the show ip igmp groups command, this command allows you to display detailed information
about multicast channels and explicit tracking information.
about multicast channels and explicit tracking information.
Examples
The following is sample output from the show ip igmp membership command. Each entry in the output
shows the aggregate membership information (indicated by the A flag) for a particular multicast group
or channel from the IGMP cache. If the entry is prepended with a forward slash (“/”) flag, the entry is a
filtering entry that is blocking the data forwarding of the multicast group or channel.
shows the aggregate membership information (indicated by the A flag) for a particular multicast group
or channel from the IGMP cache. If the entry is prepended with a forward slash (“/”) flag, the entry is a
filtering entry that is blocking the data forwarding of the multicast group or channel.
Router> show ip igmp membership
Flags:A - aggregate, T - tracked
L - Local, S - static, V - virtual, R - Reported through v3
I - v3lite, D - Urd, M - SSM (S,G) channel
1,2,3 - The version of IGMP, the group is in
Channel/Group-Flags:
/ - Filtering entry (Exclude mode (S,G), Include mode (*,G))
Reporter:
<ip-address> - last reporter if group is not explicitly tracked
<n>/<m> - <n> reporter in include mode,<m> reporter in exclude
Channel/Group Reporter Uptime Exp. Flags Interface
*,224.0.1.40 10.10.0.1 00:01:34 02:41 2LA Et2/0
*,239.1.1.1 2/0 00:00:10 stop 3AT Et2/0
group-address
(Optional) Specifies the IP address of the multicast group for which to
display IGMP membership information.
display IGMP membership information.
group-name
(Optional) Specifies the name of the multicast group, as defined in the
Domain Name System (DNS) hosts table, for which to display IGMP
membership information.
Domain Name System (DNS) hosts table, for which to display IGMP
membership information.
tracked
(Optional) Displays the multicast groups with the explicit tracking feature
enabled.
enabled.
all
(Optional) Displays the detailed information about the multicast groups
with and without the explicit tracking feature enabled.
with and without the explicit tracking feature enabled.
Release
Modification
12.0(19)S
This command was introduced.